[pulseaudio-discuss] problems with bluetooth a2dp to raspberry pi

[Hans-Peter Fier]

Hi,
I've googled a lot to find any hint on getting a bluetooth connection 
from my tablet (iPad and Android) to pulsaudio running on raspberry pi, 
but up to now without success.

My Raspberry PI system:
Linux Kernel 4.1.19-4-ARCH
bluez 5.37-2
pulseaudio 8.0-3

All packets most actual offical versions according to archlinuxarm 
distribution.

----------------------------------------------------------
Trying to connect with bluetoothctl yields:

$ connect D8:90:E8:A5:95:86

Attempting to connect to D8:90:E8:A5:95:86
Failed to connect: org.bluez.Error.Failed
----------------------------------------------------------

No message in syslog, the only hint I can find is running 
bluetooth-daemon in debugging mode, which indicates that the a2dp-plugin 
was loaded (at least no error message), but the "protocol is not 
available" (without additional information).

Lots of similar messages of this type can be found with google, but up 
to now I didn't find a hint what's going wrong.

here the bluetooth-debug with a2dp relevant output:
----------------------------------------------------------

bluetoothd[6853]: Bluetooth daemon 5.37
bluetoothd[6853]: src/main.c:parse_config() parsing main.conf
bluetoothd[6853]: src/plugin.c:add_plugin() Loading sap plugin
bluetoothd[6853]: src/plugin.c:add_plugin() Loading a2dp plugin
bluetoothd[6853]: src/plugin.c:add_plugin() Loading avrcp plugin
bluetoothd[6853]: src/plugin.c:add_plugin() Loading network plugin

bluetoothd[6853]: src/gatt-database.c:gatt_db_service_added() GATT 
Service added to local database
bluetoothd[6853]: profiles/audio/a2dp.c:media_server_probe() path 
/org/bluez/hci0
bluetoothd[6853]: plugins/hostname.c:hostname_probe()


bluetoothd[6853]: src/adapter.c:add_uuid() sending add uuid command for 
index 0
bluetoothd[6853]: profiles/audio/a2dp.c:a2dp_sink_server_probe() path 
/org/bluez/hci0
bluetoothd[6853]: profiles/audio/a2dp.c:a2dp_source_server_probe() path 
/org/bluez/hci0
bluetoothd[6853]: profiles/sap/manager.c:sap_server_probe() path 
/org/bluez/hci0
bluetoothd[6853]: Sap driver initialization failed.
bluetoothd[6853]: sap-server: Operation not permitted (1)

bluetoothd[6853]: src/service.c:change_state() 0x4eb178: device 
D8:90:E8:A5:95:86 profile audio-avrcp-target state changed: unavailable 
-> disconnected (0)
bluetoothd[6853]: profiles/audio/a2dp.c:a2dp_source_probe() path 
/org/bluez/hci0/dev_D8_90_E8_A5_95_86
bluetoothd[6853]: profiles/audio/source.c:source_init() 
/org/bluez/hci0/dev_D8_90_E8_A5_95_86
bluetoothd[6853]: src/service.c:btd_service_ref() 0x4ec020: ref=2
bluetoothd[6853]: src/service.c:change_state() 0x4ec020: device 
D8:90:E8:A5:95:86 profile a2dp-source state changed: unavailable -> 
disconnected (0)
bluetoothd[6853]: src/device.c:device_probe_profiles() Probing profiles 
for device 20:7D:74:94:30:76

bluetoothd[6853]: src/service.c:change_state() 0x4e2480: device 
20:7D:74:94:30:76 profile audio-avrcp-target state changed: unavailable 
-> disconnected (0)
bluetoothd[6853]: profiles/audio/a2dp.c:a2dp_source_probe() path 
/org/bluez/hci0/dev_20_7D_74_94_30_76
bluetoothd[6853]: profiles/audio/source.c:source_init() 
/org/bluez/hci0/dev_20_7D_74_94_30_76

bluetoothd[6853]: src/service.c:btd_service_ref() 0x4ebc88: ref=2
bluetoothd[6853]: src/service.c:change_state() 0x4ebc88: device 
20:7D:74:94:30:76 profile a2dp-source state changed: unavailable -> 
disconnected (0)
bluetoothd[6853]: src/adapter.c:adapter_service_insert() /org/bluez/hci0

bluetoothd[6853]: src/adapter.c:adapter_start() adapter /org/bluez/hci0 
has been enabled
bluetoothd[6853]: src/device.c:connect_profiles() 
/org/bluez/hci0/dev_D8_90_E8_A5_95_86 (all), client :1.309
bluetoothd[6853]: profiles/audio/a2dp.c:a2dp_source_connect() path 
/org/bluez/hci0/dev_D8_90_E8_A5_95_86
bluetoothd[6853]: a2dp-source profile connect failed for 
D8:90:E8:A5:95:86: Protocol not available

----------------------------------------------------------


Thanks for any help
HP